Hi, > If UE-A wants to communicate with UE-B by video, but UE-B only want to > communicate by audio. then UE-B rejects the video stream and the video stream is never established. Cheers, Gonzalo _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP